Well, I spent the money, I picked up a new NVIDIA GForceFX 5700 Ultra with 128 MB DDR3 RAM. Needless to say I can now play Doom how I want to. Been playing at 800x600 at High Resolution. :) I'm stuck in Delta Labs Level 2 now, I can't find an alternate way to the scond floor, guess I'll keep looking.
Gavin